main.c revision 04b7b2ff50fc77380c1e711f1d7223734547e41b
1/* 2 * Copyright 2002-2005, Instant802 Networks, Inc. 3 * Copyright 2005-2006, Devicescape Software, Inc. 4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 */ 10 11#include <net/mac80211.h> 12#include <linux/module.h> 13#include <linux/init.h> 14#include <linux/netdevice.h> 15#include <linux/types.h> 16#include <linux/slab.h> 17#include <linux/skbuff.h> 18#include <linux/etherdevice.h> 19#include <linux/if_arp.h> 20#include <linux/rtnetlink.h> 21#include <linux/bitmap.h> 22#include <linux/pm_qos.h> 23#include <linux/inetdevice.h> 24#include <net/net_namespace.h> 25#include <net/cfg80211.h> 26 27#include "ieee80211_i.h" 28#include "driver-ops.h" 29#include "rate.h" 30#include "mesh.h" 31#include "wep.h" 32#include "led.h" 33#include "cfg.h" 34#include "debugfs.h" 35 36static struct lock_class_key ieee80211_rx_skb_queue_class; 37 38void ieee80211_configure_filter(struct ieee80211_local *local) 39{ 40 u64 mc; 41 unsigned int changed_flags; 42 unsigned int new_flags = 0; 43 44 if (atomic_read(&local->iff_promiscs)) 45 new_flags |= FIF_PROMISC_IN_BSS; 46 47 if (atomic_read(&local->iff_allmultis)) 48 new_flags |= FIF_ALLMULTI; 49 50 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) || 51 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning)) 52 new_flags |= FIF_BCN_PRBRESP_PROMISC; 53 54 if (local->fif_probe_req || local->probe_req_reg) 55 new_flags |= FIF_PROBE_REQ; 56 57 if (local->fif_fcsfail) 58 new_flags |= FIF_FCSFAIL; 59 60 if (local->fif_plcpfail) 61 new_flags |= FIF_PLCPFAIL; 62 63 if (local->fif_control) 64 new_flags |= FIF_CONTROL; 65 66 if (local->fif_other_bss) 67 new_flags |= FIF_OTHER_BSS; 68 69 if (local->fif_pspoll) 70 new_flags |= FIF_PSPOLL; 71 72 spin_lock_bh(&local->filter_lock); 73 changed_flags = local->filter_flags ^ new_flags; 74 75 mc = drv_prepare_multicast(local, &local->mc_list); 76 spin_unlock_bh(&local->filter_lock); 77 78 /* be a bit nasty */ 79 new_flags |= (1<<31); 80 81 drv_configure_filter(local, changed_flags, &new_flags, mc); 82 83 WARN_ON(new_flags & (1<<31)); 84 85 local->filter_flags = new_flags & ~(1<<31); 86} 87 88static void ieee80211_reconfig_filter(struct work_struct *work) 89{ 90 struct ieee80211_local *local = 91 container_of(work, struct ieee80211_local, reconfig_filter); 92 93 ieee80211_configure_filter(local); 94} 95 96int ieee80211_hw_config(struct ieee80211_local *local, u32 changed) 97{ 98 struct ieee80211_channel *chan; 99 int ret = 0; 100 int power; 101 enum nl80211_channel_type channel_type; 102 u32 offchannel_flag; 103 104 might_sleep(); 105 106 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 107 if (local->scan_channel) { 108 chan = local->scan_channel; 109 /* If scanning on oper channel, use whatever channel-type 110 * is currently in use. 111 */ 112 if (chan == local->oper_channel) 113 channel_type = local->_oper_channel_type; 114 else 115 channel_type = NL80211_CHAN_NO_HT; 116 } else if (local->tmp_channel) { 117 chan = local->tmp_channel; 118 channel_type = local->tmp_channel_type; 119 } else { 120 chan = local->oper_channel; 121 channel_type = local->_oper_channel_type; 122 } 123 124 if (chan != local->oper_channel || 125 channel_type != local->_oper_channel_type) 126 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL; 127 else 128 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL; 129 130 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 131 132 if (offchannel_flag || chan != local->hw.conf.channel || 133 channel_type != local->hw.conf.channel_type) { 134 local->hw.conf.channel = chan; 135 local->hw.conf.channel_type = channel_type; 136 changed |= IEEE80211_CONF_CHANGE_CHANNEL; 137 } 138 139 if (!conf_is_ht(&local->hw.conf)) { 140 /* 141 * mac80211.h documents that this is only valid 142 * when the channel is set to an HT type, and 143 * that otherwise STATIC is used. 144 */ 145 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC; 146 } else if (local->hw.conf.smps_mode != local->smps_mode) { 147 local->hw.conf.smps_mode = local->smps_mode; 148 changed |= IEEE80211_CONF_CHANGE_SMPS; 149 } 150 151 if (test_bit(SCAN_SW_SCANNING, &local->scanning) || 152 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning) || 153 test_bit(SCAN_HW_SCANNING, &local->scanning) || 154 !local->ap_power_level) 155 power = chan->max_power; 156 else 157 power = min(chan->max_power, local->ap_power_level); 158 159 if (local->user_power_level >= 0) 160 power = min(power, local->user_power_level); 161 162 if (local->hw.conf.power_level != power) { 163 changed |= IEEE80211_CONF_CHANGE_POWER; 164 local->hw.conf.power_level = power; 165 } 166 167 if (changed && local->open_count) { 168 ret = drv_config(local, changed); 169 /* 170 * Goal: 171 * HW reconfiguration should never fail, the driver has told 172 * us what it can support so it should live up to that promise. 173 * 174 * Current status: 175 * rfkill is not integrated with mac80211 and a 176 * configuration command can thus fail if hardware rfkill 177 * is enabled 178 * 179 * FIXME: integrate rfkill with mac80211 and then add this 180 * WARN_ON() back 181 * 182 */ 183 /* WARN_ON(ret); */ 184 } 185 186 return ret; 187} 188 189void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, 190 u32 changed) 191{ 192 struct ieee80211_local *local = sdata->local; 193 static const u8 zero[ETH_ALEN] = { 0 }; 194 195 if (!changed) 196 return; 197 198 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 199 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid; 200 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) 201 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid; 202 else if (sdata->vif.type == NL80211_IFTYPE_AP) 203 sdata->vif.bss_conf.bssid = sdata->vif.addr; 204 else if (sdata->vif.type == NL80211_IFTYPE_WDS) 205 sdata->vif.bss_conf.bssid = NULL; 206 else if (ieee80211_vif_is_mesh(&sdata->vif)) { 207 sdata->vif.bss_conf.bssid = zero; 208 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) { 209 sdata->vif.bss_conf.bssid = sdata->vif.addr; 210 WARN_ONCE(changed & ~(BSS_CHANGED_IDLE), 211 "P2P Device BSS changed %#x", changed); 212 } else { 213 WARN_ON(1); 214 return; 215 } 216 217 switch (sdata->vif.type) { 218 case NL80211_IFTYPE_AP: 219 case NL80211_IFTYPE_ADHOC: 220 case NL80211_IFTYPE_WDS: 221 case NL80211_IFTYPE_MESH_POINT: 222 break; 223 default: 224 /* do not warn to simplify caller in scan.c */ 225 changed &= ~BSS_CHANGED_BEACON_ENABLED; 226 if (WARN_ON(changed & BSS_CHANGED_BEACON)) 227 return; 228 break; 229 } 230 231 if (changed & BSS_CHANGED_BEACON_ENABLED) { 232 if (local->quiescing || !ieee80211_sdata_running(sdata) || 233 test_bit(SDATA_STATE_OFFCHANNEL, &sdata->state)) { 234 sdata->vif.bss_conf.enable_beacon = false; 235 } else { 236 /* 237 * Beacon should be enabled, but AP mode must 238 * check whether there is a beacon configured. 239 */ 240 switch (sdata->vif.type) { 241 case NL80211_IFTYPE_AP: 242 sdata->vif.bss_conf.enable_beacon = 243 !!sdata->u.ap.beacon; 244 break; 245 case NL80211_IFTYPE_ADHOC: 246 sdata->vif.bss_conf.enable_beacon = 247 !!sdata->u.ibss.presp; 248 break; 249#ifdef CONFIG_MAC80211_MESH 250 case NL80211_IFTYPE_MESH_POINT: 251 sdata->vif.bss_conf.enable_beacon = 252 !!sdata->u.mesh.mesh_id_len; 253 break; 254#endif 255 default: 256 /* not reached */ 257 WARN_ON(1); 258 break; 259 } 260 } 261 } 262 263 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed); 264} 265 266u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) 267{ 268 sdata->vif.bss_conf.use_cts_prot = false; 269 sdata->vif.bss_conf.use_short_preamble = false; 270 sdata->vif.bss_conf.use_short_slot = false; 271 return BSS_CHANGED_ERP_CTS_PROT | 272 BSS_CHANGED_ERP_PREAMBLE | 273 BSS_CHANGED_ERP_SLOT; 274} 275 276static void ieee80211_tasklet_handler(unsigned long data) 277{ 278 struct ieee80211_local *local = (struct ieee80211_local *) data; 279 struct sta_info *sta, *tmp; 280 struct skb_eosp_msg_data *eosp_data; 281 struct sk_buff *skb; 282 283 while ((skb = skb_dequeue(&local->skb_queue)) || 284 (skb = skb_dequeue(&local->skb_queue_unreliable))) { 285 switch (skb->pkt_type) { 286 case IEEE80211_RX_MSG: 287 /* Clear skb->pkt_type in order to not confuse kernel 288 * netstack. */ 289 skb->pkt_type = 0; 290 ieee80211_rx(&local->hw, skb); 291 break; 292 case IEEE80211_TX_STATUS_MSG: 293 skb->pkt_type = 0; 294 ieee80211_tx_status(&local->hw, skb); 295 break; 296 case IEEE80211_EOSP_MSG: 297 eosp_data = (void *)skb->cb; 298 for_each_sta_info(local, eosp_data->sta, sta, tmp) { 299 /* skip wrong virtual interface */ 300 if (memcmp(eosp_data->iface, 301 sta->sdata->vif.addr, ETH_ALEN)) 302 continue; 303 clear_sta_flag(sta, WLAN_STA_SP); 304 break; 305 } 306 dev_kfree_skb(skb); 307 break; 308 default: 309 WARN(1, "mac80211: Packet is of unknown type %d\n", 310 skb->pkt_type); 311 dev_kfree_skb(skb); 312 break; 313 } 314 } 315} 316 317static void ieee80211_restart_work(struct work_struct *work) 318{ 319 struct ieee80211_local *local = 320 container_of(work, struct ieee80211_local, restart_work); 321 322 /* wait for scan work complete */ 323 flush_workqueue(local->workqueue); 324 325 mutex_lock(&local->mtx); 326 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning) || 327 rcu_dereference_protected(local->sched_scan_sdata, 328 lockdep_is_held(&local->mtx)), 329 "%s called with hardware scan in progress\n", __func__); 330 mutex_unlock(&local->mtx); 331 332 rtnl_lock(); 333 ieee80211_scan_cancel(local); 334 ieee80211_reconfig(local); 335 rtnl_unlock(); 336} 337 338void ieee80211_restart_hw(struct ieee80211_hw *hw) 339{ 340 struct ieee80211_local *local = hw_to_local(hw); 341 342 trace_api_restart_hw(local); 343 344 wiphy_info(hw->wiphy, 345 "Hardware restart was requested\n"); 346 347 /* use this reason, ieee80211_reconfig will unblock it */ 348 ieee80211_stop_queues_by_reason(hw, 349 IEEE80211_QUEUE_STOP_REASON_SUSPEND); 350 351 /* 352 * Stop all Rx during the reconfig. We don't want state changes 353 * or driver callbacks while this is in progress. 354 */ 355 local->in_reconfig = true; 356 barrier(); 357 358 schedule_work(&local->restart_work); 359} 360EXPORT_SYMBOL(ieee80211_restart_hw); 361 362static void ieee80211_recalc_smps_work(struct work_struct *work) 363{ 364 struct ieee80211_local *local = 365 container_of(work, struct ieee80211_local, recalc_smps); 366 367 mutex_lock(&local->iflist_mtx); 368 ieee80211_recalc_smps(local); 369 mutex_unlock(&local->iflist_mtx); 370} 371 372#ifdef CONFIG_INET 373static int ieee80211_ifa_changed(struct notifier_block *nb, 374 unsigned long data, void *arg) 375{ 376 struct in_ifaddr *ifa = arg; 377 struct ieee80211_local *local = 378 container_of(nb, struct ieee80211_local, 379 ifa_notifier); 380 struct net_device *ndev = ifa->ifa_dev->dev; 381 struct wireless_dev *wdev = ndev->ieee80211_ptr; 382 struct in_device *idev; 383 struct ieee80211_sub_if_data *sdata; 384 struct ieee80211_bss_conf *bss_conf; 385 struct ieee80211_if_managed *ifmgd; 386 int c = 0; 387 388 /* Make sure it's our interface that got changed */ 389 if (!wdev) 390 return NOTIFY_DONE; 391 392 if (wdev->wiphy != local->hw.wiphy) 393 return NOTIFY_DONE; 394 395 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 396 bss_conf = &sdata->vif.bss_conf; 397 398 /* ARP filtering is only supported in managed mode */ 399 if (sdata->vif.type != NL80211_IFTYPE_STATION) 400 return NOTIFY_DONE; 401 402 idev = __in_dev_get_rtnl(sdata->dev); 403 if (!idev) 404 return NOTIFY_DONE; 405 406 ifmgd = &sdata->u.mgd; 407 mutex_lock(&ifmgd->mtx); 408 409 /* Copy the addresses to the bss_conf list */ 410 ifa = idev->ifa_list; 411 while (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN && ifa) { 412 bss_conf->arp_addr_list[c] = ifa->ifa_address; 413 ifa = ifa->ifa_next; 414 c++; 415 } 416 417 /* If not all addresses fit the list, disable filtering */ 418 if (ifa) { 419 sdata->arp_filter_state = false; 420 c = 0; 421 } else { 422 sdata->arp_filter_state = true; 423 } 424 bss_conf->arp_addr_cnt = c; 425 426 /* Configure driver only if associated (which also implies it is up) */ 427 if (ifmgd->associated) { 428 bss_conf->arp_filter_enabled = sdata->arp_filter_state; 429 ieee80211_bss_info_change_notify(sdata, 430 BSS_CHANGED_ARP_FILTER); 431 } 432 433 mutex_unlock(&ifmgd->mtx); 434 435 return NOTIFY_DONE; 436} 437#endif 438 439static int ieee80211_napi_poll(struct napi_struct *napi, int budget) 440{ 441 struct ieee80211_local *local = 442 container_of(napi, struct ieee80211_local, napi); 443 444 return local->ops->napi_poll(&local->hw, budget); 445} 446 447void ieee80211_napi_schedule(struct ieee80211_hw *hw) 448{ 449 struct ieee80211_local *local = hw_to_local(hw); 450 451 napi_schedule(&local->napi); 452} 453EXPORT_SYMBOL(ieee80211_napi_schedule); 454 455void ieee80211_napi_complete(struct ieee80211_hw *hw) 456{ 457 struct ieee80211_local *local = hw_to_local(hw); 458 459 napi_complete(&local->napi); 460} 461EXPORT_SYMBOL(ieee80211_napi_complete); 462 463/* There isn't a lot of sense in it, but you can transmit anything you like */ 464static const struct ieee80211_txrx_stypes 465ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = { 466 [NL80211_IFTYPE_ADHOC] = { 467 .tx = 0xffff, 468 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 469 BIT(IEEE80211_STYPE_AUTH >> 4) | 470 BIT(IEEE80211_STYPE_DEAUTH >> 4), 471 }, 472 [NL80211_IFTYPE_STATION] = { 473 .tx = 0xffff, 474 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 475 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 476 }, 477 [NL80211_IFTYPE_AP] = { 478 .tx = 0xffff, 479 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 480 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 481 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 482 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 483 BIT(IEEE80211_STYPE_AUTH >> 4) | 484 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 485 BIT(IEEE80211_STYPE_ACTION >> 4), 486 }, 487 [NL80211_IFTYPE_AP_VLAN] = { 488 /* copy AP */ 489 .tx = 0xffff, 490 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 491 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 492 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 493 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 494 BIT(IEEE80211_STYPE_AUTH >> 4) | 495 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 496 BIT(IEEE80211_STYPE_ACTION >> 4), 497 }, 498 [NL80211_IFTYPE_P2P_CLIENT] = { 499 .tx = 0xffff, 500 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 501 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 502 }, 503 [NL80211_IFTYPE_P2P_GO] = { 504 .tx = 0xffff, 505 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 506 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 507 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 508 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 509 BIT(IEEE80211_STYPE_AUTH >> 4) | 510 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 511 BIT(IEEE80211_STYPE_ACTION >> 4), 512 }, 513 [NL80211_IFTYPE_MESH_POINT] = { 514 .tx = 0xffff, 515 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 516 BIT(IEEE80211_STYPE_AUTH >> 4) | 517 BIT(IEEE80211_STYPE_DEAUTH >> 4), 518 }, 519 [NL80211_IFTYPE_P2P_DEVICE] = { 520 .tx = 0xffff, 521 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 522 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 523 }, 524}; 525 526static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = { 527 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR | 528 IEEE80211_HT_AMPDU_PARM_DENSITY, 529 530 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 | 531 IEEE80211_HT_CAP_MAX_AMSDU | 532 IEEE80211_HT_CAP_SGI_40), 533 .mcs = { 534 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff, 535 0xff, 0xff, 0xff, 0xff, 0xff, }, 536 }, 537}; 538 539struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 540 const struct ieee80211_ops *ops) 541{ 542 struct ieee80211_local *local; 543 int priv_size, i; 544 struct wiphy *wiphy; 545 546 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config || 547 !ops->add_interface || !ops->remove_interface || 548 !ops->configure_filter)) 549 return NULL; 550 551 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove))) 552 return NULL; 553 554 /* Ensure 32-byte alignment of our private data and hw private data. 555 * We use the wiphy priv data for both our ieee80211_local and for 556 * the driver's private data 557 * 558 * In memory it'll be like this: 559 * 560 * +-------------------------+ 561 * | struct wiphy | 562 * +-------------------------+ 563 * | struct ieee80211_local | 564 * +-------------------------+ 565 * | driver's private data | 566 * +-------------------------+ 567 * 568 */ 569 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; 570 571 wiphy = wiphy_new(&mac80211_config_ops, priv_size); 572 573 if (!wiphy) 574 return NULL; 575 576 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes; 577 578 wiphy->privid = mac80211_wiphy_privid; 579 580 wiphy->flags |= WIPHY_FLAG_NETNS_OK | 581 WIPHY_FLAG_4ADDR_AP | 582 WIPHY_FLAG_4ADDR_STATION | 583 WIPHY_FLAG_REPORTS_OBSS | 584 WIPHY_FLAG_OFFCHAN_TX; 585 586 if (ops->remain_on_channel) 587 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL; 588 589 wiphy->features = NL80211_FEATURE_SK_TX_STATUS | 590 NL80211_FEATURE_HT_IBSS; 591 592 if (!ops->set_key) 593 wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 594 595 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 596 597 local = wiphy_priv(wiphy); 598 599 local->hw.wiphy = wiphy; 600 601 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 602 603 local->ops = ops; 604 605 /* set up some defaults */ 606 local->hw.queues = 1; 607 local->hw.max_rates = 1; 608 local->hw.max_report_rates = 0; 609 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF; 610 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF; 611 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE; 612 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 613 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 614 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 615 IEEE80211_RADIOTAP_MCS_HAVE_GI | 616 IEEE80211_RADIOTAP_MCS_HAVE_BW; 617 local->user_power_level = -1; 618 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask; 619 620 INIT_LIST_HEAD(&local->interfaces); 621 622 __hw_addr_init(&local->mc_list); 623 624 mutex_init(&local->iflist_mtx); 625 mutex_init(&local->mtx); 626 627 mutex_init(&local->key_mtx); 628 spin_lock_init(&local->filter_lock); 629 spin_lock_init(&local->queue_stop_reason_lock); 630 631 /* 632 * The rx_skb_queue is only accessed from tasklets, 633 * but other SKB queues are used from within IRQ 634 * context. Therefore, this one needs a different 635 * locking class so our direct, non-irq-safe use of 636 * the queue's lock doesn't throw lockdep warnings. 637 */ 638 skb_queue_head_init_class(&local->rx_skb_queue, 639 &ieee80211_rx_skb_queue_class); 640 641 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); 642 643 INIT_WORK(&local->restart_work, ieee80211_restart_work); 644 645 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter); 646 INIT_WORK(&local->recalc_smps, ieee80211_recalc_smps_work); 647 local->smps_mode = IEEE80211_SMPS_OFF; 648 649 INIT_WORK(&local->dynamic_ps_enable_work, 650 ieee80211_dynamic_ps_enable_work); 651 INIT_WORK(&local->dynamic_ps_disable_work, 652 ieee80211_dynamic_ps_disable_work); 653 setup_timer(&local->dynamic_ps_timer, 654 ieee80211_dynamic_ps_timer, (unsigned long) local); 655 656 INIT_WORK(&local->sched_scan_stopped_work, 657 ieee80211_sched_scan_stopped_work); 658 659 spin_lock_init(&local->ack_status_lock); 660 idr_init(&local->ack_status_frames); 661 /* preallocate at least one entry */ 662 idr_pre_get(&local->ack_status_frames, GFP_KERNEL); 663 664 sta_info_init(local); 665 666 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 667 skb_queue_head_init(&local->pending[i]); 668 atomic_set(&local->agg_queue_stop[i], 0); 669 } 670 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, 671 (unsigned long)local); 672 673 tasklet_init(&local->tasklet, 674 ieee80211_tasklet_handler, 675 (unsigned long) local); 676 677 skb_queue_head_init(&local->skb_queue); 678 skb_queue_head_init(&local->skb_queue_unreliable); 679 680 /* init dummy netdev for use w/ NAPI */ 681 init_dummy_netdev(&local->napi_dev); 682 683 ieee80211_led_names(local); 684 685 ieee80211_roc_setup(local); 686 687 return &local->hw; 688} 689EXPORT_SYMBOL(ieee80211_alloc_hw); 690 691int ieee80211_register_hw(struct ieee80211_hw *hw) 692{ 693 struct ieee80211_local *local = hw_to_local(hw); 694 int result, i; 695 enum ieee80211_band band; 696 int channels, max_bitrates; 697 bool supp_ht, supp_vht; 698 netdev_features_t feature_whitelist; 699 static const u32 cipher_suites[] = { 700 /* keep WEP first, it may be removed below */ 701 WLAN_CIPHER_SUITE_WEP40, 702 WLAN_CIPHER_SUITE_WEP104, 703 WLAN_CIPHER_SUITE_TKIP, 704 WLAN_CIPHER_SUITE_CCMP, 705 706 /* keep last -- depends on hw flags! */ 707 WLAN_CIPHER_SUITE_AES_CMAC 708 }; 709 710 if (hw->flags & IEEE80211_HW_QUEUE_CONTROL && 711 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE || 712 local->hw.offchannel_tx_hw_queue >= local->hw.queues)) 713 return -EINVAL; 714 715#ifdef CONFIG_PM 716 if ((hw->wiphy->wowlan.flags || hw->wiphy->wowlan.n_patterns) && 717 (!local->ops->suspend || !local->ops->resume)) 718 return -EINVAL; 719#endif 720 721 if ((hw->flags & IEEE80211_HW_SCAN_WHILE_IDLE) && !local->ops->hw_scan) 722 return -EINVAL; 723 724 /* Only HW csum features are currently compatible with mac80211 */ 725 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | 726 NETIF_F_HW_CSUM; 727 if (WARN_ON(hw->netdev_features & ~feature_whitelist)) 728 return -EINVAL; 729 730 if (hw->max_report_rates == 0) 731 hw->max_report_rates = hw->max_rates; 732 733 /* 734 * generic code guarantees at least one band, 735 * set this very early because much code assumes 736 * that hw.conf.channel is assigned 737 */ 738 channels = 0; 739 max_bitrates = 0; 740 supp_ht = false; 741 supp_vht = false; 742 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 743 struct ieee80211_supported_band *sband; 744 745 sband = local->hw.wiphy->bands[band]; 746 if (!sband) 747 continue; 748 if (!local->oper_channel) { 749 /* init channel we're on */ 750 local->hw.conf.channel = 751 local->oper_channel = &sband->channels[0]; 752 local->hw.conf.channel_type = NL80211_CHAN_NO_HT; 753 } 754 channels += sband->n_channels; 755 756 if (max_bitrates < sband->n_bitrates) 757 max_bitrates = sband->n_bitrates; 758 supp_ht = supp_ht || sband->ht_cap.ht_supported; 759 supp_vht = supp_vht || sband->vht_cap.vht_supported; 760 } 761 762 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + 763 sizeof(void *) * channels, GFP_KERNEL); 764 if (!local->int_scan_req) 765 return -ENOMEM; 766 767 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 768 if (!local->hw.wiphy->bands[band]) 769 continue; 770 local->int_scan_req->rates[band] = (u32) -1; 771 } 772 773 /* if low-level driver supports AP, we also support VLAN */ 774 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) { 775 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 776 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN); 777 } 778 779 /* mac80211 always supports monitor */ 780 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 781 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR); 782 783 /* 784 * mac80211 doesn't support more than 1 channel, and also not more 785 * than one IBSS interface 786 */ 787 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) { 788 const struct ieee80211_iface_combination *c; 789 int j; 790 791 c = &hw->wiphy->iface_combinations[i]; 792 793 if (c->num_different_channels > 1) 794 return -EINVAL; 795 796 for (j = 0; j < c->n_limits; j++) 797 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) && 798 c->limits[j].max > 1) 799 return -EINVAL; 800 } 801 802#ifndef CONFIG_MAC80211_MESH 803 /* mesh depends on Kconfig, but drivers should set it if they want */ 804 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); 805#endif 806 807 /* if the underlying driver supports mesh, mac80211 will (at least) 808 * provide routing of mesh authentication frames to userspace */ 809 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT)) 810 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH; 811 812 /* mac80211 supports control port protocol changing */ 813 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; 814 815 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) 816 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 817 else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) 818 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 819 820 WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) 821 && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK), 822 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"); 823 824 /* 825 * Calculate scan IE length -- we need this to alloc 826 * memory and to subtract from the driver limit. It 827 * includes the DS Params, (extended) supported rates, and HT 828 * information -- SSID is the driver's responsibility. 829 */ 830 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ + 831 3 /* DS Params */; 832 if (supp_ht) 833 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 834 835 if (supp_vht) 836 local->scan_ies_len += 837 2 + sizeof(struct ieee80211_vht_capabilities); 838 839 if (!local->ops->hw_scan) { 840 /* For hw_scan, driver needs to set these up. */ 841 local->hw.wiphy->max_scan_ssids = 4; 842 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 843 } 844 845 /* 846 * If the driver supports any scan IEs, then assume the 847 * limit includes the IEs mac80211 will add, otherwise 848 * leave it at zero and let the driver sort it out; we 849 * still pass our IEs to the driver but userspace will 850 * not be allowed to in that case. 851 */ 852 if (local->hw.wiphy->max_scan_ie_len) 853 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 854 855 /* Set up cipher suites unless driver already did */ 856 if (!local->hw.wiphy->cipher_suites) { 857 local->hw.wiphy->cipher_suites = cipher_suites; 858 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); 859 if (!(local->hw.flags & IEEE80211_HW_MFP_CAPABLE)) 860 local->hw.wiphy->n_cipher_suites--; 861 } 862 if (IS_ERR(local->wep_tx_tfm) || IS_ERR(local->wep_rx_tfm)) { 863 if (local->hw.wiphy->cipher_suites == cipher_suites) { 864 local->hw.wiphy->cipher_suites += 2; 865 local->hw.wiphy->n_cipher_suites -= 2; 866 } else { 867 u32 *suites; 868 int r, w = 0; 869 870 /* Filter out WEP */ 871 872 suites = kmemdup( 873 local->hw.wiphy->cipher_suites, 874 sizeof(u32) * local->hw.wiphy->n_cipher_suites, 875 GFP_KERNEL); 876 if (!suites) 877 return -ENOMEM; 878 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) { 879 u32 suite = local->hw.wiphy->cipher_suites[r]; 880 if (suite == WLAN_CIPHER_SUITE_WEP40 || 881 suite == WLAN_CIPHER_SUITE_WEP104) 882 continue; 883 suites[w++] = suite; 884 } 885 local->hw.wiphy->cipher_suites = suites; 886 local->hw.wiphy->n_cipher_suites = w; 887 local->wiphy_ciphers_allocated = true; 888 } 889 } 890 891 if (!local->ops->remain_on_channel) 892 local->hw.wiphy->max_remain_on_channel_duration = 5000; 893 894 if (local->ops->sched_scan_start) 895 local->hw.wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN; 896 897 /* mac80211 based drivers don't support internal TDLS setup */ 898 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) 899 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP; 900 901 result = wiphy_register(local->hw.wiphy); 902 if (result < 0) 903 goto fail_wiphy_register; 904 905 /* 906 * We use the number of queues for feature tests (QoS, HT) internally 907 * so restrict them appropriately. 908 */ 909 if (hw->queues > IEEE80211_MAX_QUEUES) 910 hw->queues = IEEE80211_MAX_QUEUES; 911 912 local->workqueue = 913 alloc_ordered_workqueue(wiphy_name(local->hw.wiphy), 0); 914 if (!local->workqueue) { 915 result = -ENOMEM; 916 goto fail_workqueue; 917 } 918 919 /* 920 * The hardware needs headroom for sending the frame, 921 * and we need some headroom for passing the frame to monitor 922 * interfaces, but never both at the same time. 923 */ 924 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 925 IEEE80211_TX_STATUS_HEADROOM); 926 927 debugfs_hw_add(local); 928 929 /* 930 * if the driver doesn't specify a max listen interval we 931 * use 5 which should be a safe default 932 */ 933 if (local->hw.max_listen_interval == 0) 934 local->hw.max_listen_interval = 5; 935 936 local->hw.conf.listen_interval = local->hw.max_listen_interval; 937 938 local->dynamic_ps_forced_timeout = -1; 939 940 result = ieee80211_wep_init(local); 941 if (result < 0) 942 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n", 943 result); 944 945 ieee80211_led_init(local); 946 947 rtnl_lock(); 948 949 result = ieee80211_init_rate_ctrl_alg(local, 950 hw->rate_control_algorithm); 951 if (result < 0) { 952 wiphy_debug(local->hw.wiphy, 953 "Failed to initialize rate control algorithm\n"); 954 goto fail_rate; 955 } 956 957 /* add one default STA interface if supported */ 958 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) { 959 result = ieee80211_if_add(local, "wlan%d", NULL, 960 NL80211_IFTYPE_STATION, NULL); 961 if (result) 962 wiphy_warn(local->hw.wiphy, 963 "Failed to add default virtual iface\n"); 964 } 965 966 rtnl_unlock(); 967 968 local->network_latency_notifier.notifier_call = 969 ieee80211_max_network_latency; 970 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY, 971 &local->network_latency_notifier); 972 if (result) { 973 rtnl_lock(); 974 goto fail_pm_qos; 975 } 976 977#ifdef CONFIG_INET 978 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 979 result = register_inetaddr_notifier(&local->ifa_notifier); 980 if (result) 981 goto fail_ifa; 982#endif 983 984 netif_napi_add(&local->napi_dev, &local->napi, ieee80211_napi_poll, 985 local->hw.napi_weight); 986 987 return 0; 988 989#ifdef CONFIG_INET 990 fail_ifa: 991 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, 992 &local->network_latency_notifier); 993 rtnl_lock(); 994#endif 995 fail_pm_qos: 996 ieee80211_led_exit(local); 997 ieee80211_remove_interfaces(local); 998 fail_rate: 999 rtnl_unlock(); 1000 ieee80211_wep_free(local); 1001 sta_info_stop(local); 1002 destroy_workqueue(local->workqueue); 1003 fail_workqueue: 1004 wiphy_unregister(local->hw.wiphy); 1005 fail_wiphy_register: 1006 if (local->wiphy_ciphers_allocated) 1007 kfree(local->hw.wiphy->cipher_suites); 1008 kfree(local->int_scan_req); 1009 return result; 1010} 1011EXPORT_SYMBOL(ieee80211_register_hw); 1012 1013void ieee80211_unregister_hw(struct ieee80211_hw *hw) 1014{ 1015 struct ieee80211_local *local = hw_to_local(hw); 1016 1017 tasklet_kill(&local->tx_pending_tasklet); 1018 tasklet_kill(&local->tasklet); 1019 1020 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, 1021 &local->network_latency_notifier); 1022#ifdef CONFIG_INET 1023 unregister_inetaddr_notifier(&local->ifa_notifier); 1024#endif 1025 1026 rtnl_lock(); 1027 1028 /* 1029 * At this point, interface list manipulations are fine 1030 * because the driver cannot be handing us frames any 1031 * more and the tasklet is killed. 1032 */ 1033 ieee80211_remove_interfaces(local); 1034 1035 rtnl_unlock(); 1036 1037 cancel_work_sync(&local->restart_work); 1038 cancel_work_sync(&local->reconfig_filter); 1039 1040 ieee80211_clear_tx_pending(local); 1041 rate_control_deinitialize(local); 1042 1043 if (skb_queue_len(&local->skb_queue) || 1044 skb_queue_len(&local->skb_queue_unreliable)) 1045 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); 1046 skb_queue_purge(&local->skb_queue); 1047 skb_queue_purge(&local->skb_queue_unreliable); 1048 skb_queue_purge(&local->rx_skb_queue); 1049 1050 destroy_workqueue(local->workqueue); 1051 wiphy_unregister(local->hw.wiphy); 1052 sta_info_stop(local); 1053 ieee80211_wep_free(local); 1054 ieee80211_led_exit(local); 1055 kfree(local->int_scan_req); 1056} 1057EXPORT_SYMBOL(ieee80211_unregister_hw); 1058 1059static int ieee80211_free_ack_frame(int id, void *p, void *data) 1060{ 1061 WARN_ONCE(1, "Have pending ack frames!\n"); 1062 kfree_skb(p); 1063 return 0; 1064} 1065 1066void ieee80211_free_hw(struct ieee80211_hw *hw) 1067{ 1068 struct ieee80211_local *local = hw_to_local(hw); 1069 1070 mutex_destroy(&local->iflist_mtx); 1071 mutex_destroy(&local->mtx); 1072 1073 if (local->wiphy_ciphers_allocated) 1074 kfree(local->hw.wiphy->cipher_suites); 1075 1076 idr_for_each(&local->ack_status_frames, 1077 ieee80211_free_ack_frame, NULL); 1078 idr_destroy(&local->ack_status_frames); 1079 1080 wiphy_free(local->hw.wiphy); 1081} 1082EXPORT_SYMBOL(ieee80211_free_hw); 1083 1084static int __init ieee80211_init(void) 1085{ 1086 struct sk_buff *skb; 1087 int ret; 1088 1089 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 1090 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 1091 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 1092 1093 ret = rc80211_minstrel_init(); 1094 if (ret) 1095 return ret; 1096 1097 ret = rc80211_minstrel_ht_init(); 1098 if (ret) 1099 goto err_minstrel; 1100 1101 ret = rc80211_pid_init(); 1102 if (ret) 1103 goto err_pid; 1104 1105 ret = ieee80211_iface_init(); 1106 if (ret) 1107 goto err_netdev; 1108 1109 return 0; 1110 err_netdev: 1111 rc80211_pid_exit(); 1112 err_pid: 1113 rc80211_minstrel_ht_exit(); 1114 err_minstrel: 1115 rc80211_minstrel_exit(); 1116 1117 return ret; 1118} 1119 1120static void __exit ieee80211_exit(void) 1121{ 1122 rc80211_pid_exit(); 1123 rc80211_minstrel_ht_exit(); 1124 rc80211_minstrel_exit(); 1125 1126 if (mesh_allocated) 1127 ieee80211s_stop(); 1128 1129 ieee80211_iface_exit(); 1130 1131 rcu_barrier(); 1132} 1133 1134 1135subsys_initcall(ieee80211_init); 1136module_exit(ieee80211_exit); 1137 1138MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 1139MODULE_LICENSE("GPL"); 1140